14” Mioplosus Labracoides Fish Fossil, Green River (02/21/2011)

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14” Mioplosus Labracoides Fish Fossil, Green River

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14” Mioplosus Labracoides Fish Fossil, Green River

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Sold Date: 02/21/2011
Channel: Online Auction
Source: eBay
Category: Natural History

Here’s a chance to own a hard-to-find, large sized Mioplosus fossil fish!

You are bidding on a hard-to-find 14” Mioplosus Labracoides fossil fish from the Green River Formation in Wyoming. The hard slab measures 17 1/4" x 7 1/4" x 1 1/2" and is in excellent condition!

Mioplosus Labracoides description

This 50 million year-old, Eocene-Era fossil fish comes from one of the world's famous Laggerstatten , the Green River Formation in Wyoming. The significant extent of soft-tissue preservation that makes the site famous is evident in this specimen.

Very similar to today's perch, the Mioplosus is distinguished by its double dorsal fin and pointed teeth . They are thought to be solitary predators often attacking fish up to half of their size. They range from 2 to 20 inches long.

Mioplosus is uncommon in the Green River formation , especially this size and of this exceptional quality (both bone detail and some soft-tissue preservation are evident).

The Mioplosus is known as a predator by its many pointed teeth and because many have been found with fish lodged in their throats. They may be related to the modern-day pike of the genus Stezostedion.

The unusually excellent preservation of the Green River fish fossils is usually attributed to a combination of two factors: 1) a cold period during the Eocene that would have caused dead fish to sink faster due to a less inflated swim bladder; and 2) the great depth of the lakes and the consequent anoxic conditions that would have often prevented scavengers from disturbing the carcasses.

UPDATE: I have added more pictures for all those who have requested them.

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